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Prepared By vatsal patel 10 EE 04,Guided By  A.B. Solanki Sir

Abstract

In this seminar we discuss about the six stroke engine. It include Introduction, the types of six stroke engine than how to work this six stroke, Factors contributing to increased thermal Efficiency, Reduced Fuel Consumption and Pollutant Emission Advantages & Disadvantages of this engine. And last Conclusion of this seminars: SIX STROKE ENGINE.

Content

Introduction
Types of Six st ....etc

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HCCI PROJECT

NAME : REVATHI
WANT PROJECT ON HCCI ....etc

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Progress and Recent Trends in Homogeneous Charge CompressionIgnition (HCCI) Engines
What Is HCCI?
An HCCI engine is a mix of both conventional spark-ignition and diesel compression ignition technology.
HCCI is characterized by the fact that the fuel and air are mixed before combustion starts and the mixture auto-ignites as a result of the temperature increase in the compression stroke.
The resulting spontaneous burn produces a flameless energy release in a large zone almost simultaneously -- very different th ....etc

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Abstract
Homogeneous charge compression ignition (HCCI) is a form of internal combustion in which well-mixed fuel and oxidizer (typically air) are compressed to the point of auto-ignition. Homogeneous charge compression ignition (HCCI) engines have
the potential for high efficiencies and low pollutant emissions.By comparison with spark ignition (SI) engines, for example,HCCI engines can yield a 15-20% increase in fuel economy while emitting lower levels of oxides of nitrogen (NOx).HCCI engines can also achieve thermal eff ....etc

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I WANT PPT OF 5 STROKE ENGINE. I HAVE TECHNICAL SEMINAR, ITS ARGENTS ....etc

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....etc

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abstract
An opposed-piston hydraulic free piston engine operating with homogenous charge compression ignition (HCCI) combustion, has been proposed by State Key Laboratory of Engines as a means of significantly improving the IC engine’s cycle thermal efficiency and lowering exhaust emissions. Single and multi-zone Chemkin model with detailed chemical kinetics, and unique piston dynamics extracted from one dimensional gas dynamic model, have been used to analyze the combustion characteristics and engine performance. Intake heating, va ....etc

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EFFECTS OF KEY FACTORS ON THE ENGINE COMBUSTION MODE SWITCHING BETWEEN HCCI AND SI
INTRODUCTION
 HCCI IS A PROMISING ENGINE COMBUSTION CONCEPT
 ADVANTAGES OF HIGH FUEL ECONOMY AND ULTRA LOW NOx EMISSIONS
 LIMITED APPLICATION-DIFFICULTY IN CONTROLLING AUTO-IGNITION
 SOLUTION:A HYBRID COMBUSTION SYSTEM IN GASOLINE DIRECT INJECTION ENGINES
HYBRID COMBUSTION SYSTEM
 COMBINATION OF SI AND HCCI MODE IN DIFFERENT OPERATING REGIONS
 HCCI MODE IN MIDDLE/LOW LOADS
 SI MODE IN HIGH SPEED/ ....etc

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Dementia in Stroke Survivors in the Stroke Data Bank Cohort

We determined the prevalence of dementia in 927 patients with acute ischemic stroke aged
years in the Stroke Data Bank cohort based on the examining neurologist's best judgment
Diagnostic agreement among examiners was 68% ( K = 0 3 4 ) . Of 726 testable patients, 116 (16%)
were demented. Prevalence of dementia was related to age but not to sex, race, handedness,
educational level, or employment status before the stroke. Previous stroke and previous
myocar ....etc

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